Isotactics polyfluorene - Monomers, Polymers, Diblockcopolymers

全同立构聚芴 - 单体、聚合物、二嵌段共聚物

• 批准号: 227781876
• 负责人: Professor Dr. Ullrich Scherf
• 金额: --
• 依托单位: Arbeitsgruppe Makromolekulare Chemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/227781876?language=en
• 关键词: Isotactics; polyfluorene; Monomers; Polymers; Diblockcopolymers

Targets of the proposed project are the synthesis, isolation and characterization of isotactic polyfluorenes. This research project has been running for two years and is not yet funded. The introduction of polar substituents (e.g. cyanoethyl-group in i-PF8-2CN) will cause the dipolar interaction of the side chains and should lead to an increased solid state order. Furthermore, we will investigate the possibility of ß-phase formation in isotactic polyfluorenes. Further on, rod/rod-type all-conjugated diblock copolymers will be synthesized in a „grafting from“ polymerization using a monobromo-terminated poly(3-alkylthiophene) macromonomer and chiral AB-type-fluorene monomers. Their optical, thermal and packing properties will be compared to all-conjugated block copolymers made from the corresponding racemic fluorine monomers. Hereby, also amphiphilic systems with a polar polythiophene block (e.g. with phosphonic ester side chains) and non-polar polyfluorene block are interesting due to their specific self-organization behavior. The optical and chiroptical properties of the resulting block copolymers will be investigated in detail, especially for chiral induction effects caused by the reduced symmetry.

该项目的目标是全同聚芴的合成、分离和表征。这个研究项目已经进行了两年，但尚未获得资助。极性取代基（例如i-PF 8 -2CN中的氰乙基）的引入将引起侧链的偶极相互作用，并应导致固态有序性的增加。此外，我们将研究在全同立构聚芴中形成α-相的可能性。进一步地，将使用单溴封端的聚（3-烷基噻吩）大分子单体和手性AB型芴单体在“接枝自”聚合中合成棒/棒型全共轭二嵌段共聚物。将它们的光学、热学和填充性能与由相应的外消旋氟单体制成的全共轭嵌段共聚物进行比较。因此，具有极性聚噻吩嵌段（例如具有膦酸酯侧链）和非极性聚芴嵌段的两亲性体系由于其特定的自组织行为而也是令人感兴趣的。将详细研究所得嵌段共聚物的光学和手征光学性质，特别是由对称性降低引起的手征诱导效应。